Given a function module which implements function Z= F(X, Y), which defined as follows: Z = F(X,Y), where X and Y are integer parameters for F. The...

Given a function module which implements function Z= F(X, Y), which defined as follows: Z = F(X,Y), where X and Y are integer parameters for F. The detailed definition is given below. -- | X + Y when 10<=X<=20, and 12<=Y<=30 Z = | X - Y when 0<=X<10, and 0<=Y<12 | 0 under other conditions -- Please answer the following questions: · (4%) Identify the equivalence classes in [X, Y]. (hints: Considering Z as a function F with X and Y input